Coordination CompoundHard
Question
The complex [Fe(H2O)5NO]2+ is formed in the brown ring test for nitrates when freshly prepared FeSO4 solution is added to aqueous solution of NO3- ions followed by addition of conc. H2SO4. Select correct statement about this complex.
Options
A.Hybridisation of iron is sp3d2.
B.Iron has +1 oxidation state.
C.It has magnetic moment of 3.87 b. M. confirming three unpaired electrons in Fe.
D.All the above are correct statements.
Solution
[Fe(I) (H2O)5 NO+] 
Three unpaired electrons
six - sp3d2 hybrid orbital
So m = 3.87.

Three unpaired electrons
six - sp3d2 hybrid orbital
So m = 3.87.
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